Atriangle has two angles measuring 90 degrees and 50 degrees, calculate the third angle of the triangle.

a. 50

b. 40

c. 45

d. 75

What expression is equivalent to 42x-56y

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10